Date : Thu, 30 May 1991 01:43:25 GMT
From : cis.ohio-state.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!wuarchive!waikato.ac.nz!comp.vuw.ac.nz!actrix!ewen@ucbvax.Berkeley.EDU (Ewen McNeill)
Subject: Re: Osborne 1, Questions Answered
In article <7@tdatirv.UUCP> pa1@tdatirv.UUCP (Pat Alvarado) writes:
> In article <1991May23.email@example.com> firstname.lastname@example.org
(Ewen McNeill) writes:
> >The RS232 port apparently is
> >only TTL levels, so some line driver/receivr chips would be needed.
> The Osborne 1 uses the standard 1488 and 1489 chips to the external port
> of the RS232 interface, and uses +/- 12VDC to drive the signals.
Sorry, folks. I mis-read the data I was sent. TX, and RX are held at
normal levels. Some of the information I was sent, however, noted that
some control lines were held at +5V. This confused me, when I quickly put
together a summary.
> ||| Pat Alvarado |
> v Teradata Corporation | email@example.com
> /\ /\ 100 N. Sepulveda Blvd. | uunet!edsews!hacgate!tdat!pa1
> /// \\\ El Segundo, Calif. 90245 | firstname.lastname@example.org
Ewen McNeill, email@example.com